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log sub 4 of ,25 + 3 log sub 4 of x =5 log sub 4 of 2 + 1/3 log sub 4 of 64 please help me figure out how to solve it 

 Dec 5, 2014

Best Answer 

 #1
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+5

Let's look at log(0.25):

It will be easy to write the log₄ if we can write 0.25 as 4ⁿ (that's expressing 4 to some power n)

because the log then is that power n

It happens that 0.25 = 1/4 = 4⁻¹

So we are really looking at log(4⁻¹)

and this simplifies to just -1 (see that power, well that's the log!)

 

Now, you have to do the same thing with log(2)

and also log(64) (but this last one is very easy).

 

Having done that, you are well on the way .....

 

 Dec 5, 2014
 #1
avatar
+5
Best Answer

Let's look at log(0.25):

It will be easy to write the log₄ if we can write 0.25 as 4ⁿ (that's expressing 4 to some power n)

because the log then is that power n

It happens that 0.25 = 1/4 = 4⁻¹

So we are really looking at log(4⁻¹)

and this simplifies to just -1 (see that power, well that's the log!)

 

Now, you have to do the same thing with log(2)

and also log(64) (but this last one is very easy).

 

Having done that, you are well on the way .....

 

Guest Dec 5, 2014

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